I purchased a 5950x two weeks ago for 598 USD. If you feel the need to torture your already fast CPU. 5800 may have a slight advantage in games in its stock form..AMD's 3D V-Cache does not scale with high voltages.
AMD Confirms Ryzen 7 5800X3D Is Not Overclockable : Read more
This makes a lot of sense to me. AMD's probably having a lull with their Zen 4 production and they really want to put this new technology in the field and seeing what works and whatnot.
Well, using PBO voids the warranty.No can do, the increase in rma would kill any profit from it.
The worst part for AMD is that short of putting OTP fuses in the CPU that must be blown to enable PBO/OC/etc., AMD has no way of knowing what you have done with the chips. The easiest way to duck out of that is to ditch overclocking altogether.
With AM5 and Ryzen 6000(?) set to launch and of 2022, the window for changing architectural things now is little/none.
I was thinking something along these lines. This might be a version 1 part, so they might not want to push things. It sounds like they went from doing this to the 5900X to doing it to the 5800X, and then cutting the clock. There must have been good reasons.
Apps don't have any control or awareness of cache anyway. But it might be helpful in applications where they're doing something repeatedly enough that it stays in cache.so you're looking at 500mhz freq difference; too big of a gap for games that don't care about cache size
What if the v-cache makes up for the ~500mhz loss and lower voltage Wouldn't that make it a more efficient CPU?my problem with this is that it's not just 200mhz off the top frequency vs 5800x
5800x is cheaper & easily gets to 4.9-5.0 with PBO
so you're looking at 500mhz freq difference; too big of a gap for games that don't care about cache size
There's no way 1.3v or 1.35v being the limit. Changing LLC for example could get this thing to overshoot and kill it during AVX .
What happened here;my best guess is that they are using unused Epyc dies that are binned for 1.3v and not Ryzen dies that are binned for 1.5v
And as such they are blocking PBO, OC out of fear of RMAs and nothing to do with cache or extra filler on top of the cores.
The X has nothing to do with overclocking for AMD's processors, and even the non-X Ryzen CPUs have had overclocking unlocked. It's largely just there on some models to indicate a higher-end version of a processor at a given core count. And in the case of X3D, that stands for "Hybrid 3D" at least according to AMD when they announced it over two years ago.Then they should have called it the 58003D, NOT X.
In gaming the 12700k/12900k don't use the same watts as when running p95 or cinebench. They are on par with AMD's efficiency when gaming and the 12700k exceeds it in watts per frame per Igor's testing.With AM5 and Ryzen 6000(?) set to launch and of 2022, the window for changing architectural things now is little/none.
I would agree that this smells like a guinea pig from AMD. Its likely/possible that it's a limitation of strapping Vcache to an architecture that wasn't explicitly designed for it. Whereas, Ryzen 6000 could have been designed around these voltage pitfalls (time will tell). But heck, if they can slap Vcache on previous-gen architecture to bide themselves a good stopgap "flagship" against Intel for the majority of 2022...why not!? Keep in mind, the 5800X3D probably won't draw much/any more power than the ~100W that the 5800X draws. Compare that to the 150-200W of the 12700K/12900K that it's competing against. Also, if the 5800X3D can beat or match the 12900KS while consuming nearly half the power, it will be a resounding win for AMD and an utter embarrassment for Intel.
Talking from personal experience going from a 2700X to a 3800XT and having a 5600X as an HTPC system, I can tell you why: when you're running a Ryzen CPU that is not thermally constrained PBO increases performance by a lot, plus whatever the motherboard considers "safe" in therms of OC headroom. Again, this is when keeping temperatures in check.As long as the performance is right why does overclocking matter apart from the ‘fun’ aspect?
Sorry but that doesn’t answer it. It doesn’t matter what any other cpu does. If I am paying X and I know I will get Y performance I can make a decision based on that, overclocking does not change this.Talking from personal experience going from a 2700X to a 3800XT and having a 5600X as an HTPC system, I can tell you why: when you're running a Ryzen CPU that is not thermally constrained PBO increases performance by a lot, plus whatever the motherboard considers "safe" in therms of OC headroom. Again, this is when keeping temperatures in check.
What AMD is saying here is simple to me: the cache will put a constraint in power delivery (locked/capped SoC-CPU voltage), no matter the thermal headroom of the CPU. So if you've already invested in a good cooling solution, be it AIO, a beefy HSF or whatever, it'll mean the CPU will run very cool, but won't give you that "step up" in performance based on the money you have already invested/spent on the cooling solution. Sure, it may be really efficient and run cool, but what good is that to me when I can't translate it into more performance?
As people has already mentioned, ALL Ryzen CPUs have a lot of performance headroom you don't even need to fiddle much with to extract, so the already small extra gap this CPU brings will be even smaller using a properly cooled (and in turn, self-OC'ed) 5800X or better.
The only saving grace of this CPU will be HTPC? Something where thermal constraints are more important than whatever extra headroom you can get with a beefy cooling solution? That's hardly an enticing proposition for me at least. And I sincerely wonder* how many here can honestly say, with a straight face, this CPU is what they were really expecting. I can certainly say it is not what I expected.